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Publication: U. S. Fish and Wildlife Service 1993 Endangered and Threatened Wildlife and Plants; Determination of Endangered Status for Four Endemic Puerto Rican Ferns Federal Register, vol. 58, no. 109 32308-32311

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Kingdom Plantae
	Adiantum vivesii Proctor -- accepted -- Puerto Rico maidenhair
	Elaphoglossum serpens Maxon & C.V. Morton ex Maxon -- accepted -- Cerro de Punta jayuya, serpent tonguefern, Cerro de Punta tonguefern
	Polystichum calderonense Proctor -- accepted -- Monte Guilarte hollyfern
	Tectaria estremerana Proctor & A.M. Evans -- accepted

Integrated Taxonomic Information System - Taxon Author Search Results